Infiniti QX56 (JA60). Manual - part 845

 

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Infiniti QX56 (JA60). Manual - part 845

 

 

SEC-26

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005147083

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Modern

vehicle is equipped with many electronic control unit, and each control unit shares information and links with

other control units during operation (not independent). In CAN communication, control units are connected

with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less

wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart, refer to 

LAN-44, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000005147084

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005147085

1.

PERFORM SELF DIAGNOSTIC

1. Turn ignition switch ON and wait for 2 seconds or more.

2. Check “Self Diagnostic Result”.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-5, "CAN Communication Control Circuit"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When Intelligent Key unit cannot communi-
cate CAN communication signal continuous-
ly for 2 seconds or more.

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Transmission
• Receiving (BCM)
• Receiving (ECM)
• Receiving (METER/M&A)

U1010 CONTROL UNIT (CAN)

SEC-27

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000005147086

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Modern

vehicle is equipped with many electronic control unit, and each control unit shares information and links with

other control units during operation (not independent). In CAN communication, control units are connected

with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less

wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart, refer to 

LAN-44, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000005147087

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005147088

1.

REPLACE INTELLIGENT KEY UNIT

When DTC [U1010] is detected, replace Intelligent Key unit.

>> Replace Intelligent Key unit.

Special Repair Requirement

INFOID:0000000005147089

1.

REQUIRED WORK WHEN REPLACING INTELLIGENT KEY UNIT

Initialize control unit. Refer to CONSULT-III Operation Manual.

>> Inspection End.

DTC

CONSULT-III display de-

scription

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT (CAN)

When detecting error during the initial diagnosis of CAN control-
ler of Intelligent Key unit.

Intelligent Key unit

SEC-28

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2013 ID DISCORD I-KEY-STRG

B2013 ID DISCORD I-KEY-STRG

Description

INFOID:0000000005147090

Intelligent Key unit performs the ID verification with the steering lock solenoid and releases the steering lock if

both Intelligent Key unit and steering lock solenoid ID are same. Intelligent Key unit starts the communication

with the steering lock solenoid when Intelligent Key is carried into the vehicle and the ignition knob switch is

pressed.

DTC Logic

INFOID:0000000005147091

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Press the ignition knob switch.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-28, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147092

Regarding Wiring Diagram information, refer to 

SEC-94, "Wiring Diagram - INTELLIGENT KEY SYSTEM/

ENGINE START FUNCTION -"

.

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can steering lock be released with re-registered mechanical key?

YES

>> Steering lock solenoid was unregistered.

NO

>> GO TO 2

2.

CHECK STEERING LOCK SOLENOID POWER SUPPLY-1

1. Turn ignition switch OFF.

2. Disconnect steering lock solenoid connector.

3. Check voltage between steering lock solenoid harness connec-

tor and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2013

STRG COMM 1

The ID verification results between Intelligent Key 
unit and steering control unit are NG. The registra-
tion is necessary.

Steering lock solenoid

Terminals

Voltage (V)

(Approx.)

(+)

(–)

Steering lock solenoid con-

nector

Terminal 

M15

1

Ground

Battery voltage

WIIA1202E

B2013 ID DISCORD I-KEY-STRG

SEC-29

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3.

CHECK STEERING LOCK SOLENOID GROUND CIRCUIT

Check continuity between steering lock solenoid harness connector

and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

4.

CHECK STEERING LOCK SOLENOID COMMUNICATION CIRCUITS

1. Disconnect Intelligent Key unit connector.

2. Check continuity between steering lock solenoid connector (A)

M15 terminals 2, 3 and Intelligent Key unit connector (B) M70

terminals 1, 32. 

3. Check continuity between steering lock solenoid connector (A)

M15 terminals 2, 3 and ground. 

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Repair or replace harness.

5.

CHECK INTELLIGENT KEY UNIT POWER SUPPLY-2

1. Connect Intelligent Key unit connector.

2. Check voltage between Intelligent Key unit harness connector

and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace Intelligent Key unit. Refer to 

SEC-120,

"Removal and Installation"

.

6.

CHECK STEERING LOCK SOLENOID COMMUNICATION CIRCUIT

1. Connect steering lock solenoid connector.

Terminals

Continuity

(+)

(–)

Steering lock solenoid con-

nector

Terminal 

M15

4

Ground

Yes

WIIA1203E

Terminals

Continuity

Steering lock sole-

noid connector

Terminal 

Intelligent Key unit 

connector

Terminal 

M15

2

M70

1

Yes

3

32

Terminals

Continuity

Steering lock solenoid connector

Terminals 

M15

2

Ground

No

3

WIIA1206E

Terminals

Voltage (V)

(Approx.)

(+)

(–)

Intelligent Key unit connector

Terminal 

M70

1

Ground

5

WIIA1204E

 

 

 

 

 

 

 

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